Abstract: [Objective] To assess the purification effect of spatial electric field on greenhouse gas and its impact on temperature and humidity in the livestock house in winter and spring. [Method] The spatial electric field purification equipment as well as temperature and humidity monitors were installed in the livestock house. Three air extraction points were set inside and outside livestock house, respectively, and four heights including 0 m, 0.5 m, 1.0 m and 1.5 m were set for each air extraction point. The changes of greenhouse gas concentrations as well as temperature and humidity during winter and spring were systematically monitored. [Result] Spatial electric field significantly （P<0.05 or P<0.000 1） reduced the concentrations of CH₄, NH₃ and CO₂ inside the livestock house in winter and spring by 39.8%, 26.3% and 24.0%, respectively. Spatial electric field significantly （P<0.05） decreased the ambient humidity inside the livestock house from 20：00 to 8：00 and from 12：00 to 15：00 in winter by 4.5% and 15.3%, respectively. In spring, the ambient humidity inside the livestock house was significantly （P<0.05） decreased by 31.9% from 9：00 to 17：00. [Conclusion] The spatial electric field can effectively reduce the concentrations of CH₄, NH₃ and CO₂ and significantly decrease the indoor humidity of different time duration in the livestock house in winter and spring.

Key words: spatial electric field, livestock house, air purification